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Finding the Fourth Proportional to 427,954.20, 641,639.70 and 203,422.20

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Solution

The fourth proportional to 427,954.20, 641,639.70 and 203,422.20 is: 304,994.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,954.20 : 641,639.70 = 203,422.20 : x
  2. Step 2: Convert to fraction form
    427,954.20/641,639.70 = 203,422.20/x
  3. Step 3: Cross multiply
    427,954.20x = 641,639.70 × 203,422.20
  4. Step 4: Simplify right side
    427,954.20x = 130,523,759,381.34
  5. Step 5: Solve for x
    x = 130,523,759,381.34/427,954.20
  6. Step 6: Final answer
    x = 304,994.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.